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Tether, another digital currency tied to the US dollar, was used to artificially inflate bitcoin prices, according a study released Wednesday by the University of Texas. John Griffin, a finance professor at the university, and graduate student Amin Shams analyzed blockchain purchases and discovered that major Tether buys were timed to follow market downturns and helped stabilize bitcoin's floor. "These patterns cannot be explained by investor demand," they said in the study. Griffin and Shams have also recently found that the VIX, Wall Street's volatility index, was being manipulated. A lawsuit filed in March cited their research to claim traders manipulated the value of VIX options and f... Full story

13 June